Remove token pools from the cache upon deletion

[awrichar]

Fixes #1355

[matthew1001]

LGTM

[Chengxuan]

Does look like we are repeating logic in the firely-common library. Will raise a PR to fix this outstanding debt.

[codecov-commenter]

Codecov Report

Merging #1356 (7615c29) into main (a1a47d1) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

❗ Current head 7615c29 differs from pull request most recent head ce08f5c. Consider uploading reports for the commit ce08f5c to get more accurate results

@@            Coverage Diff             @@
##             main    #1356      +/-   ##
==========================================
- Coverage   99.99%   99.99%   -0.01%     
==========================================
  Files         314      314              
  Lines       21537    21500      -37     
==========================================
- Hits        21535    21498      -37     
  Misses          1        1              
  Partials        1        1              

Impacted Files	Coverage Δ
internal/assets/token_pool.go	100.00% <100.00%> (ø)
internal/cache/cache.go	100.00% <100.00%> (ø)

[Chengxuan]

@awrichar @matthew1001 PR raised to move to common lib kaleido-io#71